This call came to my phone when I was unable to answer it. But, due to the unrecognizable number, the fact that they didn't leave any message, AND the *fact* that Googling this number generated numerous responses already in place on numerous websites just for this purpose,
I have NO doubt at all that this was a spoofed number from the beginning, currently being used by any number of potential robbers, spoofers, scammers,or would-be immoral and amoral criminals. They will remain "potential" and "would-be" as long as their calls remain unanswered.
Answering them for any reason just puts the ball right back in their court for them to use however they wish. Ignoring them leaves it your own for you to use any number of ways. At the very least, it can be put on your own personal phone "blacklist" so that it remains either unconnected to your phone, or identified as spoofed, so that it doesn't get answered in future, even by mistake.
United States